Why are more women waiting for the man to be ready for kids when it used to be the opposite in the past?

In the past, the preference was towards the woman. She would be the one making him wait. She was the one selecting her timeframe because she was fully aware of her own biology. She was aware that she's the one (not the man) with the linited time to have babies before losing the ability to give birth.

Now it's waiting for the man to be ready for kids and it has caused more women to either be childless longer, desperately wait for that proposal they'll never have or be in a rush to find another suitable man before their time to be mothers run out. Meanwhile their so called boyfriend is sitting on the couch relaxing, taking all his time.

Why are more women waiting for the man to be ready for kids when it used to be the opposite in the past?
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